Aeroplane



iM9929, 1930. J.. HLAVACEK 1,159,698

AEROPLANE Filed April so, 1929 6 sheets-sheet l Inventor fan Ma vacef Attorney May 220,I 1930. J. HLAvAcEK 1,759,698

' i `AEROPLANE .Filed April 30, 1929 6 Sheets-Sheet 2 Tlv?. 2.

Inventor Jon/L H'Zavacelr A Homey May 20, 1930. .L`HLAvAcEKl I 1,759,598

AEROPLANE Filed April 30, 1929 l 6 Sheejs-Sheet 4 72211 Illas/doek,

A ttorney,

nven'ior l May zo, "19305 J. HLAVACEK 1,759,698

AEROPLANE 'Filed April so, 1929, 6 sheets-sheet 5 a Inventor E dn Hlavacelf Attorney May 2 0, 1930. J. HLAvAcEK 1,759,698

AEROPLANE Filed April 3Q, 1929 6 Sheets-Sheet 6 Inventor 50 46 afan HZVace/r By @MMM Attorney Patented May 20, Y1930A JAN .HLAVAQEIL F CHICAGO, ILLINOIS AEROPLANE Application led vApril 30,

The present invention relatesto aeroplanes land has for its prime object lto ,provide vimproved wing structures having means incorporated Ithereinwhereby the areaof the wing fsurface vmay be increased Aor decreased as may ,be `desi-red under different maneuvers.

Another very important object of the'in- Aventi'on resides inthe provision of a shutter vlike arrangement on the yrear edge of the 1Owing l.of ya-n aeroplane with means associated therewith-for opening and closing the shutterstructure to increase or decrease the wing surface. Y

Thus in landing, making quick take OES, climbing quickly, and other similar maneuvers, the Ashutter like vstructure may be ,closed Rto ,afford a greater wing surface whereas in straight ahead level flying and other ordinary -maneuvers,the shutter like structure may be kept close Another very important object of the invention resides in the provision of an improved vstructure ofy this nature which is con- A still further very important object of the invention resides in the provision of improved vstructure of this nature which is simple7 easy to manipulate, strong and durable, thoroughly eiiicient and reliable in use and operation, and otherwise well `adapted tothe purpose for 4which itis designed.

AWith the-:above and numerousother objects .in View as will appear vas the description proceeds, the invention resides in certain novel features of construction, and in the combination and yarrangement Vof yparts as will ybe hereinafter more fully described and claimed.

'In thedrawings: v

Figure l isa top plan view of an aeroplane yembodying the features of my invention, showing the shutter like structure closed, 'f

Figure 2 is a similar view showing the structure open,

Figure 3 is a diagrammatic view .illustrating particularly the operating mechanism for the shutter like structure,

Figure is a fragmentary large detail rear elevation of a wing,

1929. Serial No. 359,295.

Figure 5 is an enlarged detail section taken substantially on the line 5 5 of Figure 2,

Figure 6 is a sectional view taken substantially on .the yline G+S ofFigure-ll,

Figure 7 is a fragmentary sectional .view 55 showing one end of the casing and the Srear 6o perspective view of .one .of

4the frames,

Figure 10 is yan lenlarged detailed longitudinal vertical section through the bottom ofthe cockpit of-,the fuselage showing the foot lcontrol operating mechanism,

YFigure l1 is aV perspective view of the'lever thereof,

c Figure l2 yis a vfragmentary `perspective view of one of the rear frame bars, f

yFigure 13 is a .sectional view-therethrough showing one lof the shutter pins -pivotallyengaged therein, trollable ybythe foot ofthe aviator Vin the Figure 14 is a fragmentary perspective view of the casing, 75 Figure l5 is a fragmentary perspective view of one portion of the casing, Figure 116 is an end elevationof one of'th wings showing Vthe rear portion in section with theshutter mechanism in an open position, f Y

Figure 17 is a similar view with the shutter mechanism vin a closed position,

Figure 18 is a perspective view of a trap or engaging the braces with the rear frame ar; Y u

Figure 19 is a fragmentary perspective view of the rear edge of one of the wings,

Figure '20 is a detail view of two of the shutter pins showing the same in overlapping closed relationship, and f Figure 2l is .a top plan view showing another embodiment ofthe invention.

Referring to the ydrawing in detail it will be seen that the numeral 5 denotes la fuselage with wings 6 extending laterally therefrom in the .usualwellknown manner'. The rear edges of the wings are enlarged in thickness as is indicated at 7 and have a plurality of 100 ins 8 projecting therefrom Aone for each fshu'tter 'n9. In the rear edge 7 which is hollowed out there is mounted a casing of U-shaped formation in cross section and hav- Ving a depending outward flange 11 on one edge. v

f A curved top 12 has a flange of curved construction as at 14 to 4engage under the Vflange 11 and another flange 15 at the other end thereof to be bolted or otherwise secured to the other edge of the casingV 10. A plurality of straps 16 are secured to the bottom portion of the casing and having continuous extensions 17 to be driven into the edge 7 asis clearly illustrated in Figure 5.v Y

Plates 18 are secured to the rear faces of ythe edgesito extend over the rear of the casing" andare fastened thereto in'any suitable manner.

Y Brackets 19 in theY outer end of each casing 'have a shaft 20 journaled 'therein withv a Hsprocket 21 fixed thereto over which is trained a chain section 22. The shaft 20'is journaled through the rear wall of the casing 10. Other shafts 23 are ournaledthrough the rear wall of the casing and on their inner ends have cranks'24 with center hubs 25 fixed to the shaft while the ends are vprovided-with clamp structures 26 for engaging wires 27 fixed to .the chain segments 22. v

- VOn the rear portlons of the shafts 2O and i 23 are mounted the 'shutter like fins 9. These fwires-27 are trained over a plurality of pul- A leys 30 and attached to ends of rockers 31.

' This rocker V31'is pivoted intermediate its ends in a bracket v32extending from the floor 33 of the cockpit of the fuselage and a `spring 34 isengaged with one arm of the rockvertical planes.V

A foot lever 35i's pivoted as atY 36 and has y afootpiece37 Vat its upper end. Alink 38 is pivotally engagedas'at 39 with its intermediate portion of the lever 35 and as at 40 with v the other end or rather the extremity of the other arm of the rocker 31.

' Obviously by pressing on the foot lever so as to swing in a clockwise direction in Figure 10 orreferring to Figure 3y for better illus- Y tration it will be seen that the rocker 31 will b e rocked to pull the wires and cause the closing of the shutter like fins.' i

Frame bars are denoted by numerals and have the reanends of the fins 9 rockable therein and at their ends are provided with forward extensions 46 fixed to the wings. These frame bars 49 are braced byv braces 47 secured to the wings and secured tothe frame bars by U-shapedfstraps 48 as is clearlyV illustrated in Figure 8.

It will be noted that the frame bars and the braces are oval in cross section. In the embodiment just described and shown assembled 3- .llgllle l 31.1112 it will beseen that the shutter like structure terminates to the inner Side of ailerons 50 butin the embodiment of the invention disclosedat 21 the shutterlike'V structures extend to the ends of the wings and ailerons 50 are located forwardly thereof.

When the shutter like fins are closed that is substantially horizontally disposed they overlap each other as is clearly shown in Figure From the above detailed description it is thought that the construction, operation, utility and advantages of my invention now is clearly` understood without a more detailed description thereof.

The presentembodiment of they invention has been disclosed in considerable detail merely for the purposes of exemplication since in actual practice it attains the features of advantage'enumerated as desirable in the statement of the invention and -the above description. Y Y It will be apparent that changes in the details of construction, and in! the combination and arrangement-,of parts may be resorted to Vwithout departing from the spirit or scope ofthe invention as hereinafter claimed Vor -V sacrificing any of its advantages. y

Having thus described vmy invention, what Iclaimasnewis: 'f Y Y 1. VIn combination, an aeroplane wing having an enlarged rear end with arecess therein, aV casing in the recess, a plurality of shafts journaled' through the casing, means for si-l multaneously rocking the shafts, shutterfins on the shaft exteriorly of and to the rear of -the'casing., Y

2. In combination, an aeroplane wing having an enlargedrear end with a recess therein, a casing in the recess,a plurality of shafts journaled through the casing, means for simultaneously rocking the shafts, shutter fins on the shaft exteriorly of Vand to the rear of the casing, a frame structure mounted-on the wings in which the rear end of the fins are journaled. Y j

3. In combination, an aeroplane wing having van enlarged rear end with a recess there- A in, a casing in the recess, a plurality of shafts journaled through` the casing, means for simultaneously rocking the shafts, shutter fins on the shaft exteriorly of and tothe rear of the casing, a frame structure mounted on the wings in which the rear end ofthe fins Yare journaled, said casing comprising aibottom portion of U-.shaped sectional formation, a top for said bottom portion,'interlocking flanges on the top and bottom `of the casing and a bolted flange on the top of the casing to engageY the casing. Y

v 4. In combination, an aeroplane wing having an enlarged rear end with a recess therein, a casing in the recess, a plurality of shafts journaled through the casing, means for simultaneously rocking the shafts, shutter ns on the shaft exteriorly of and to the rear of the casing, a frame structure mounted on the Wings in which the rear end of the fins are journaled, the rear edge of the Wing being formed with fins, a pair for each shutter.

In testimony whereof I afx my signature.

JAN HLAVACEK. 

